Quantum Reality

I had a similar situation with an Athlon X2 4600+. I just jacked the FSB up and ran it at 2.64 GHz and got bang-on speeds. My situation was that I was running DDR2-667 RAM and it would apply a divider and run it at 600 when at stock.

__________________

raisethe3

Bleh, I am okay now guys. Thank you guys.

__________________

The Unofficial MSI K9N2 SLI PLATINUM Owners Thread

|The Samsung Owners Club|-Mozilla Firefox Club|We Are Gr33n Machine|~Corsair PSU Fan Club~|~EVGA Fan Club~

faisal

i understand nothing about the chart on 1st page....what is means by column in white?anybody please clear that

Quantum Reality

Basically the first line in every table is your stock speed settings. What you do is look up the multiplier for your AMD CPU and then match it to what you know your RAM is rated for (if you have DDR2-1066 assume 800 for now; I don't know all the rules for which AM2+/AM3 processors can natively handle 1066, so bleh).

Example: My Athlon64 X2 4600+ had a base clock of 200 MHz and ran at 2.4 GHz. So it has a 12x multiplier.

Let us now look at the 12X table. Now, I had RAM rated at DDR2-667. Notice that the ACTUAL speed it would run that memory at is listed at 600 in the same row as the HT speed of 200.

This is why I had to overclock it to a 220 MHz speed upon which it makes the RAM run at 667. (217 is close enough, and you can see the speed for that would be 661. I think you get the idea now.)

__________________

Willage

what CPUz is showing is the bus speed of the ram, to get the bus speed you need to half the speed of your ram, so 800MHz ram has a bus speed of 400Mhz, thats why CPUz shows that

and technically the ram will run at what ever the bus speed of your CPU is at
and no you can't change that, because the overall system speed is determined by the slowest hardware in your system, out of CPU/RAM/Motherboard

my E8500 has a bus speed of 333Mhz, i have 800Mhz (400mhz bus speed) ram
so technically my ram is running at 667Mhz (333Mhz buss) speed, hence why i am changing my ram later on, and i don't overclock my system so i have no real need for this ram anyway

alwaysAMD

With K8 processors, the ram speed is determined by half the cpu multiplier. So if you're running a 4600+, 200x12 would give you 2.4Ghz. 12/2=6, so 2400/6 = 400, or DDR2-800. Since youre running a 5600+ brisbane, it would equate to 14.5x200 for 2900. The problem is that it automatically rounds down, so 14.5/2 = 7.25. This rounds down to 7, so your RAM speed is calcualted as 2400/7 = 342ish, so 342x2=685Mhz DDR2. Hopefully this makes sense.

__________________

reberto

When I was using S939, I had all those pretty much memorized (but for 939)

__________________
For Sale: Backup rig + parts

BOYCOTT YOUR MOTHER!

faisal

i'm clear now..thanks my frens..

Quantum Reality

Um you should be able to run your RAM at 800. I've had a CPU like yours, a Q9550, and I had no issues running it at 800. The thing is, Intel CPUs prior to the i7 do not have integrated memory controllers and so the North Bridge has more flexibility in setting clock dividers that will let you run your RAM precisely as you wish it. For example a 4:5 divider would let your RAM run at basically DDR2-800 speeds.

This, however, is off topic since we're in an AMD forum. If you have questions about your Intel RAM speeds you should make a thread on the Intel Memory forum.

__________________

IaVoR

if that 5600+ is the 65nm its normal since i have that exact same chip and mine memory speed was 727mhz due to the chip's multiplier it was 14.5

__________________
It has been said that if you place an infinite amount of monkies by one typewriter each, one of them will eventually write a literary masterpiece. The Internet has proven that this is not the case.